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Temka [501]
3 years ago
10

PLZ PLZ PLZ HELP ME GET THIS RIGHT ILL GIVE 40 POINTS AND BRAINLY IF THERE BOTH RIGHT, I REALLY NEED HELP I SUCK AT GEOMETRY!!!

Mathematics
1 answer:
tia_tia [17]3 years ago
8 0
I believe they are both 120
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-11 and 1/6 as a decimal
Nikolay [14]

-11.1666667 should be the answer


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3 years ago
The illuminance of a surface varies inversely with the square of its distance from the light source.If the illuminance of a surf
VashaNatasha [74]

Answer:

Distance between the surface and source of light will be increased by 6 meters.

Step-by-step explanation:

The illuminance of a surface varies inversely with the square of ts distance from the light source.

Let illuminance of the surface = x lumens per square meter

and distance from a light source = y meter.

Now x ∝ \frac{1}{y^{2} }

Or x=\frac{k}{y^{2} } [k = proportionality constant]

Now we will find the value of k.

k = xy²

k = 120×(6)²

k = 4320

We have to calculate the distance of the source if illuminance of the surface is 30 lumens per square meter.

30=\frac{4320}{y^{2}}

y² = \frac{4320}{30}

y² = 144

y = √144 = 12 meters

So the source of the light will be shifted away from the surface = 12 - 6 = 6 meters.

6 0
3 years ago
Find y'(<img src="https://tex.z-dn.net/?f=%5Csqrt%5B3%5D%7B3%7D" id="TexFormula1" title="\sqrt[3]{3}" alt="\sqrt[3]{3}" align="a
Bingel [31]

Given

2x³ + (x³ - 3) sin(2πy) - 3y = 0

we first notice that when x = ³√3, we get

2 (³√3)³ + ((³√3)³ - 3) sin(2πy) - 3y = 0

2•3 + (3 - 3) sin(2πy) - 3y = 0

6 - 3y = 0

3y = 6

y = 2

Differentiating both sides with respect to x gives

6x² + 3x³ sin(2πy) + 2π (x³ - 3) cos(2πy) y' - 3y' = 0

Then when x = ³√3, we find

6(³√3)² + 3(³√3)³ sin(2π•2) + 2π ((³√3)³ - 3) cos(2π•2) y' - 3y' = 0

6•³√9 + 3•3 sin(4π) + 2π (3- 3) cos(4π) y' - 3y' = 0

6•³√9 + 0 + 0 - 3y' = 0

3y' = 6•³√9

y' = 2•³√9

(that is, 2 times the cube root of 9)

8 0
2 years ago
What's the expression with addition for -7-(-10)?​
Natasha2012 [34]

Answer:

3 is your answer

Step-by-step explanation:

-7-(-10)= 3

5 0
3 years ago
Read 2 more answers
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